The Dmca1D channel mediates Ca2+ inward currents in Drosophila embryonic muscles

Yusuke Hara, Masayuki Koganezawa, Daisuke Yamamoto

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


We studied, in a genetic model organism, Drosophila melanogaster, the channel mechanisms underlying membrane excitation in the embryonic body wall muscle whose biophysical properties have been poorly characterized. The inward current underlying the action potential was solely mediated by a high-threshold class of voltage-gated Ca2+ channels, which exhibited slow inactivation, Ca2+ permeability with saturation at high [Ca2+]OUT, and sensitivity to a Ca2+ channel blocker, Cd2+. The Ca2+ current in the embryonic muscle was completely eliminated in Dmca1D mutants, indicating that the Dmca1D-encoded Ca2+ channel is the major mediator of inward currents in the body wall muscles throughout the embryonic and larval stages.

Original languageEnglish
Pages (from-to)117-123
Number of pages7
JournalJournal of Neurogenetics
Issue number2-3
Publication statusPublished - 2015 Jul 3


  • Ca channel gating
  • Capermeability
  • mutants
  • skeletal muscle
  • whole-cell patch clamp relation


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